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Re:AMD Claims Arm ISA Doesn't Offer Efficiency Advantage ove... by monocasa on Monday September 08, 2025 @11:03PM (#45176908)
> While I'm not a hardware designer, my gut says that you can probably do x86 instruction length-decoding in one cycle

That's been my understanding as well. X86 style length decoding is about one pipeline stage if done dynamically.

The simpler riscv length decoding ends up being about a half pipeline stage on the wider decoders.

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